SIMD64, SIMD64 

extension SIMD64: ElementaryFunctions where Scalar: ElementaryFunctions
extension SIMD64: AdditiveArithmetic where Scalar: FloatingPoint
extension SIMD64: Differentiable
where
  Scalar: Differentiable & BinaryFloatingPoint,
  Scalar.TangentVector: BinaryFloatingPoint
extension SIMD64: EuclideanDifferentiable
where
  Scalar: EuclideanDifferentiable & BinaryFloatingPoint,
  Scalar.TangentVector: BinaryFloatingPoint
extension SIMD64
where
  Scalar: Differentiable & BinaryFloatingPoint,
  Scalar.TangentVector == Scalar
`Scalar`: `Differentiable` 및 `BinaryFloatingPoint`, `Scalar.TangentVector`: `BinaryFloatingPoint`에서 사용 가능
`Scalar`: `Differentiable` & `BinaryFloatingPoint`, `Scalar.TangentVector` == `Scalar`에서 사용 가능

  • 선언 

    @derivative
subscript(_: <<error type>>) -> <<error type>> { get }